Well you're going to be happy, because that's exactly what we're getting, although it seems doubtful that we'll get a Focus RS (300hp), although a Focus ST seems likely (~220hp). The new global Focus is on the newest C-series platform, which strangely enough means the Focus will leapfrog the Mazda3 in chassis gen (the current Mazda3 is on C1e IIRC).
Some of the crazier options will probably be dropped for US production, as you can configure a Focus in the UK well into the $40k-$50k area. Even with VAT considered, that's a helluva lot of $, and I don't think the masses over here are ready to pay that much for a Ford compact, hell I don't think any brand compact can sell a lot of cars in that price range for the compact segment.
The *only* thing that makes me a bit sad though, is that the new Focus will see the end of the era of the brilliant MK1/1.5 Foci, and the ~2550lb weight. The new ones will tip over 3000lbs just like the Mazda3, C30, and Euro Focus of '04+. People complained about the US Focus holding over the original MK1 chassis underpinnings, but really, I'd rather drive a ~140hp 2.0L on 2550lb than a 115hp 1.6L on 3000lbs+ (most Euro Focus sales are in this segment) that costs more.
For the new US Focus to be successful, they *must* use that awesome new 2.5L motor that's in the '10+ Fusion. 175hp w/3000lbs would be just fine. If they go cheap, they're going to lose a lot of the fun factor.